Derrick safety appliance



Nov. 25, 1930. R. F. TUCK w DERRICK SAFETY APPLIANCE Filed April so, 1928 Patented Nov. 25', 1930. 7

. RUSSELL r. TUCK, or Lone BEACH, CALIFORNIA DERRICK SAFETY APPLIANCE A iplicationfiled April 30,

I This invention relate s to a: derricksafety applianceto be used in protectingthe derrick manduring the drilling, pumping, or repair of an oil well, and to keephim from being Q5, injured by falling to the floor of the derrick.

The derrick man stands on a board near the top of the derrick andhis ordinary duty is 1 are withdrawn'or run into the well. i It frequently occurs that the derrick man is caught by the hook, elevator or thelike, and is jerked upwardly off of the board and, then falls off of 1ihe hook, down ontothe floor of the dere ric.

An object of my invention is to provide an appliance to which the derrick manisjattached whether he is standing on the board,

or is carried upwardly'by the hook.

.Another object'is to provide an appliance of the character stated in which. the. shock.

of the falling derrick man is relieved so that the attaching rope, or encircling. belt, part and permit the man to fall to the floor.

.A further object'is to provide an appliance of the character stated which can be read-.

ily attached toany usual and well-known type of derrick.

Other objects, advantages, and features of invention may appear from. the accompanying drawing, the subjoined detailed description, and the appended claims.

"a derrick with my appliance in position there- In the drawing: i Fig. l'is a fragmentary sectional view of Fig. 2 is a side elevation of my appliance 40] with parts shown in section.

Fig. 3 is atransverse sectional view of the rider.

derrick girders 3, 4 by suitable means-such as the hook bolts 5, 6, or the like. The hook bolts are preferable in event that the derrick is of steel construction but if it is of a wood the guides may be nailed or otherwise secured in position.

a The brackets 1, 2 are spaced a considerable distance 'apartand a was. Serial No. 274,109. a

rod 7 extends between the brackets and is slidably mounted therein; Nuts 8, 9 are screwed to the 3 bottom, respectively, of the rod and a coil spring 10 surrounds .the rod and is positioned between the nut 8 and the top of the bracket 1. The purpose of this a spring will be further described.

to handle the elevators to release or engage the pipe, sucker rods, and so forth, as they A rider 11 is slidably mounted on the rod 7 and is provided withan opening-'12 thereerably a wire cable, issecured which leads tothe belt around the waist "of the derrick man. I

.A spring lfi isprovidedfor the purpose of holding the rider in] alposition to always engage the rod so that it will not readily slide down along'the rod, and one end of this spring is secured to the rider and the other end extends upwardly and partly encircles the rod, thus pressingthe outer endof the rider downwardly and tending to bringlthe sharp edges of the opening 12'into engage ment with the rod; Thus the rider wilialways beheld and will not readily fall down wardly along therod. An adjustable stop collar l6is provided onthe rod for the purposeo f limiting the downward movement ofthe'rider. y

..In operation, if the derrick man should be caught the hook andcarried upwardly the rider will. follow along the post and when the derrick man falls off of the hook, either bydisengaging himself or by his clothes tearing, he will fall only a short distance. Y In fact, just thelength of the connecting cable between his beltand the riderand then his further fall will be stopped? The rod 7 will yield against the spring 10, thus overcoming theflshock'of the fall. If the rider '11 should slide downwardly along the red. the

above the bracket 2, will catch the same and the post will yield, as above described.

In order that the driller on the floor of the derrick may be made aware of an accident to the derrick man, I provide a cable 17 which is secured to the rider 11, and this cable extends over sheaves 18 secured to the derrick. A suitable signaling device (not shown) is provided on the floor of the derrick and the cable 17 extends thereto; thus when the rider 11 is carried upwardly or downwardly, the cable 17 will be bolted to. actuate the signal device, thus apprising the driller of the fact that an accident has occurred. The driller then stops the hook or elevator and the derrick man is released.

Having described my invention, I claim:

1. A safety derrick appliance comprising a post, means slidably mounting said post on the derrick, yieldable means against which said post rests, and a rider slidably mounted on the post to which the derrick man is secured, and means on the rider adapted to grip said post.

2. A. safety derrick appliance comprising a pair of brackets, means securing said brackets to the derrick, a. post slidably mounted in said brackets, spring means a ainst which said post rests, and a rider slidably mounted on the post to which the derrick man is adapted to be secured, and means on the rider adapted to grip said post.

3. A safety derrick appliancecomprising a pair of brackets, means securing said brackets to the derrick, a post slidably mounted in said brackets, spring means against which said post rests, and a rider slidably mounted on the post to which the derrick man is adapted to be secured, and a stop collar secured to said post above the lower-most bracket.

A safety derrick appliance comprising a pair of brackets, means securing said brackets to the derrick, a post slidably mounted in said brackets, a nut screwed onto the top and bottom of said post, a spring between the top nut and the upper bracket whereby the post is yieldably mounted, and a rider slidably mounted on the post between the brackets to which the derrick man is adapted to be secured and means on the rider adapted to grip said post.

5. A safety derrick appliance comprising a pair of brackets, means securing said brackets to the derrick, a post slidably mounted in said brackets, a nut screwed onto the top and bottom of said post, a spring between the top nut and the upper bracket whereby the post is yiel'dably mounted, and a rider slidably mounted on the post between the brackots to which the derrick man is adapted to be secured, and a spring engaging said rider adapted to hold the same in any position on the post.

6. A safety derrick appliance comprising a pair of brackets, means securing said brackets to the derrick, a post slidably mounted in said brackets, spring means against which said post rests, and a rid-er slidably mounted on the post to which the derrick man is adapted to be secured, and a spring engaging said rider adapted to hold the same in any position on the post.

7. A safety derrick appliance comprising a pair of brackets, means securing said brackets to the derrick, a post slidably mounted in said brackets, spring means against which said post rests, and a rider slidably mounted on the post to which the derrick man is adapted to be secured, and a spring engaging said rider adapted to hold the same in any position on the post, and a stop collar adjustably secured to the post above the lowermost bracket.

8. A derrick safety appliance comprising upper and lower brackets, means sccurin g said brackets to the derrick, a. post slidably mounted in the brackets, a nut screwed onto the top and bottom of the rod, a coil spring surrounding the rod and positioned between the upper nut and the upper bracket, a rider slidably mounted on the rod between the brackets, said rider having an elongated opening therein to permit free movement upwardly along the rod, and a spring secured to the rider and engaging the rod whereby the rider is held at any point along the rod, and a stop collar on the rod above the lower-most bracket.

In testimony whereof, I afiix my signature.

RUSSELL F. TUCK. 

